Many of my prized accomplishments in life have been because I have been told NO enough times to find another way getting it done. Frustration has its place. It can be intimidating and depressing. But perhaps it is telling you something – to be more creative, adaptive or persuasive. If it be a good thing, it may just mean you need to find an alternative; take a longer and perhaps more challenging road to realize your objective. NO is never a good reason to give up on a good thing!